Universal 4- Slots Vertical GPU kit (with Gen 4 riser) - LIAN LI is a Leading Provider of PC Cases | Computer Cases
Phanteks Gen4 Vertical GPU Bracket, 220mm Flat Line PCI-E Gen4 x16 Riser Cable Kit Case Accessories - Newegg.com
Vertical GPU Mounting Kit | PC Components
Amazon.com: EZDIY-FAB Vertical Graphics Card Holder Bracket Support with Multi-Angle,GPU Mount,Video Card VGA Support Kit with PCIE3.0 Riser Cable- Black : Electronics